 |
| |||
| infrasound | |||
| infrasonic sounds | |||
| infrasonic; infrasonic frequency | |||
| infrasound Vibrations of the air at frequencies too low to be perceived as sound by the human ear, below about 15 hertz; infrasonic vibration | |||
| |||
| low-frequency noises | |||
|
infrason : 3 短语, 3 学科 |
| 信息技术 | 1 |
| 联合国 | 1 |
| 通讯 | 1 |